Appellee American Friends Service Committee (employer) is a religious corporation, whose principal operation is philanthropic work and many of whose employees are conscientious objectors to war, performing alternative civilian service. Appellees Lorraine Cleveland and Leonard Cadwallader (employees) are present or past employees of the employer.

Because of their religious beliefs, the employees in 1969 requested their employer to cease withholding 51.6% 1 *8of the portion of their wages required to be withheld under § 3402 of the Internal Revenue Code.2 Although they conceded that these amounts were legally due to the Government, they wished to bear witness to their beliefs by reporting the amounts as taxes owed on their annual income tax returns but refusing to pay such amounts. They would thus compel the Government to levy in order to collect the taxes.

In response to the employees’ request, the employer ceased withholding from the employees’ salaries 51.6% of that amount required to be withheld under § 3402, although it continued to pay the full amount required to be withheld under that provision to the Government. It then brought a suit for refund of the amount it had paid to the Government but not actually withheld from salaries. The appellee employees joined the employer’s action, seeking on their own behalf an injunction barring the United States’ enforcement of § 3402 against the employer with regard to 51.6% of the required withholding. They argued that, even though they were liable for these amounts, § 3402 as applied to this portion of their wages was unconstitutional as a deprivation of their right to free exercise of religion under the First Amendment since it did not allow them to bear witness to their beliefs by refusing to voluntarily pay a portion of their taxes.

The District Court ordered a refund of amounts tendered by the employer but not withheld by it, since the Government had also levied on the employees for these taxes and hence had received a double payment of the *9amount due. The Government does not contest this portion of the District Court’s judgment.3

The District Court also enjoined the United States from enforcing § 3402 against the employer with respect to 51.6% of the required withholding from the employees’ salaries, holding that § 3402 as applied to this amount constituted an unconstitutional abridgment of the right to free exercise of religion. The United States appeals this portion of the judgment.4 The District Court’s opinion and order were entered before this Court handed down its opinions in Bob Jones University v. Simon, 416 U. S. 725 (1974), and Commissioner v. “Americans United” Inc., 416 U.S. 752 (1974).

The Anti-Injunction Act, 26 U. S. C. § 7421 (a), provides that no suit for the purpose of restraining the assessment or collection of any tax shall be maintained in any court by any person, whether or not such person is the person against whom such tax was assessed.” 5 In Bob Jones, supra, we rejected an appeal to create judicial exceptions to § 7421 (a) other than that carved out in Enochs v. Williams Packing & Navigation Co., Inc., 370 U. S. 1 (1962). We noted that Williams Packing was *10the “capstone” of judicial construction of the Act and spelled an end to cyclical departures from the Act’s plain meaning. Bob Jones University v. Simon, supra, at 742. In “Americans United” Inc., supra, we stated that a pre-enforcement injunction against the assessment or collection of taxes could be granted only if it were clear that the Government could in no circumstances ultimately prevail on the merits, and that equity jurisdiction existed. “Unless both conditions are met, a suit for preventive injunctive relief must be dismissed.” 416 U. S., at 758.

The employees concede, and the District Court found, that § 3402 withholding is a method of collection of taxes within the meaning of § 7421 (a).6 They further concede, as they must, that they are not within the Williams Packing exception; far from the Government’s defense in a refund suit being meritless, the employees concede that the Government would undoubtedly prevail in such a refund action.

They contend, however, that since the District Court enjoined only one method of collection, and the Government is still free to assess and levy their taxes when due, the Act does not apply. But this contention ignores the plain wording of the Act which proscribes any “suit for the purpose of restraining the assessment or collection of any tax.” The District Court’s injunction against the collection of the tax by withholding enjoins the collection of the tax, and is therefore contrary to the express language of the Anti-Injunction Act.

*11The employees also argue that the Anti-Injunction Act is inapplicable because they have no alternative legal remedy available. They contend that a refund suit would be an inadequate remedy, in view of the concession on their part that the taxes are due, since they would surely lose such an action. But this ignores the fact that inadequacy of available remedies goes only to the existence of irreparable injury, an essential prerequisite for traditional equity jurisdiction, but only one of the two parts of the Williams Packing test. Commissioner v. “Americans United” Inc., supra, at 762; Bob Jones University v. Simon, supra, at 745. Here as in “Americans United” Inc., supra, the employees will have a “full opportunity to litigate” their tax liability in a refund suit. 416 U. S., at 762. Even though the remitting of the employees to a refund action may frustrate their chosen method of bearing witness to their religious convictions, a chosen method which they insist is constitutionally protected, the bar of the Anti-Injunction Act is not removed:

“[Decisions of this Court make it unmistakably clear that the constitutional nature of a taxpayer’s claim, as distinct from its probability of success, is of no consequence under the Anti-Injunction Act.” Id., at 759.

See also Lockerty v. Phillips, 319 U. S. 182, 187 (1943).

In Bob Jones we left open the question of whether in-junctive relief as to future collection would be proper as a form of ancillary relief in a refund suit where the taxpayer prevailed on the merits, in order to avoid the necessity of continuous subsequent “backward-looking refund suits.” 416 U. S., at 748 n. 22. That situation is not presented here since the employees have never brought a refund action, much less prevailed on the merits of such an action. Their joinder in the employer’s successful refund action, based on the receipt of double payment by *12the Government, would afford no basis for injunctive relief based on their constitutional claim. The injunctive relief granted by the District Court in this case is plainly at odds with the dual objectives of the Act: efficient and expeditious collection of taxes with “a minimum of pre-enforcement judicial interference,” and protection of the collector from litigation pending a refund suit. Bob Jones, supra, at 736-7377

The judgment of the District Court is reversed insofar as it enjoins the collection of taxes by the Government and the withholding of wages by the employer.

Reversed in part.

dissenting.

The sole question on the merits is whether the provision of the Internal Revenue Code, 26 U. S. C. § 3402, which requires employers to deduct and withhold from wages federal income taxes, is constitutional as applied to employees, who on religious grounds object to the withholding taxes on their salaries which represent that portion of the federal budget allocated to military expenditures.1 They invoke the Free Exercise Clause of the First Amendment, as they are Quakers who are opposed to participation in war in any form and who claim that this method of collection directly forecloses their ability freely to *13express that opposition, i. e., to bear witness to their religious scruples.

There is no evidence that questions the sincerity of the employees’ religious beliefs. Nor is there any issue raised as to whether that religious belief would give the employees a defense against ultimate payment of the tax. The District Court held that the withholding was unconstitutional as to the employees, 368 F. Supp. 1176, a conclusion with which I agree.

The withholding process2 forecloses the employees from bearing witness against the use of these monthly deductions for military purposes. Under the opinion of this Court, they are deprived of bearing witness to their opposition to war — these withheld portions of their salaries pay the entire tax and they therefore have “no alternative legal remedy,” a circumstance which distinguishes both Enochs v. Williams Packing Co., 370 U. S. 1, and Bob Jones University v. Simon, 416 U. S. 725.

Quakers with true religious scruples against participating in war may no more be barred from protesting the payment of taxes to support war than they can be forcibly inducted into the Armed Forces and required to carry a *14gun, and yet be denied all opportunity to state their religious views against participation. See United States v. Seeger, 380 U. S. 163. The Court misses the entire point of the present controversy. The employees are barred from protesting these monthly deductions under the Court’s opinion. In Enochs v. Williams Packing Co., supra, and Bob Jones University v. Simon, supra, taxpayers sought to enjoin the collection of taxes by any means whatever, while the taxpayers litigated the question whether the taxes were due at all. Here the employees challenge the withholding law as depriving them of their one and only chance of contesting the constitutionality of the withholding of the tax as applied to them. So, unlike Enochs and Bob Jones University, there is no remedy by way of refund.3

The religious belief which the Government violates here is that the employees must bear active witness to their objections to their support of war efforts. Dr. Edwin Bronner, who qualified as an expert on the history of *15Quakerism, gave testimony which, as summarized by the District Court, 368 F. Supp., at 1178, stated: “[M]ost Quakers have considered it an integral part of their faith[4] to bear witness to the beliefs which they hold. It has always been the prevailing view that simple preaching of one's beliefs is not sufficient, and that one’s actions must accord with and give expression to one’s beliefs. Many of the employees of the AFSC, including particularly appellees’ Cleveland and Cadwallader, share this belief, and for these employees, the operation of the withholding tax, which leaves them no option as to the payment of the taxes which they conscientiously question, operates as a direct abridgment of the expression and implementation of deeply cherished religious beliefs.”

If we are faithful to the command of the First Amendment, we would honor that religious belief. I have not bowed to the view of the majority that “some compelling state interest” will warrant an infringement of the Free Exercise Clause. Sherbert v. Verner, 374 U. S. 398, 406-407; Braunfeld v. Brown, 366 U. S. 599, 603. I have previously dissented from that position and opposed amending by judicial construction the plain command of the Free Exercise Clause. See Sherbert v. Verner, supra, at 410-413; McGowan v. Maryland, 366 U. S. 420, 575-576; Arlan’s Department Store v. Kentucky, 371 U. S. 218.

The Anti-Injunction Act, 26 U. S. C. § 7421 (a), is no barrier. No “assessment or collection of any tax” is restrained, only one method of collection is barred, the *16Government being left free to use all other means at its disposal. Moreover, to construe the Act as the Court construes it does not avoid a constitutional question but directly raises one. The Act, read as literally as the Court reads it, plainly violates the First Amendment as applied to the facts of this case, for “no law” prohibiting the free exercise of religion includes every kind of law, including a law staying the hand of a judge who enjoins a law for the collection of taxes that trespasses on the First Amendment.

The power of Congress to ordain and establish inferior courts (Lockerty v. Phillips, 319 U. S. 182, 187) has not to this date been assumed or held to mean that Congress could require a federal court to take action in violation of the Constitution. Thus suspension of the writ of habeas corpus is restricted to “Cases of Rebellion or Invasion” where “the public Safety may require it.” Art. I, § 9, cl. 2. And when it comes to the First Amendment and the free exercise of religion, the mandate is that “Congress shall make no law . . . prohibiting” it. The Anti-Injunction Act is a “law”; and the Constitution gives no such preference to tax laws as to permit them to override religious scruples. May Congress enact a law that prohibits a minister from preaching if his taxes are in arrears? Or that disallows the making of a protest to a tax assessment even though the assessment and payment violate one’s religious scruples? Until today, I would have thought not. The First Amendment, as applied to the States by the Fourteenth, bars a tax on the conduct of a religious exercise by a minority even though that religious exercise is obnoxious to the majority. Murdock v. Pennsylvania, 319 U. S. 105. Dicta to the effect that an allegation of unconstitutionality is irrelevant under the Anti-Injunction Act (Bailey v. George, 259 U. S. 16, 20) — which the Court today elevates to a holding — were based on the premise that there *17was an alternative remedy to the unconstitutional actions. Here, as demonstrated, there is no other remedy. A refund suit is of no value, since the religious scruples which these taxpayers invoke relate to their inability to protest the payment, not to the use of the taxes themselves for military purposes.

I would affirm the judgment below.