Alway pay credit card first because it has the higher interest rate. What you can do is approach both. Use whatever amount of money that will bring your credit balance current. If not the full amount then just enough so you’re not over due.
Apply the rest to the tax installment loan so that you reduce your debt to income ratio on both accounts.

Pay what is required on every account. Then put the rest toward the tax lien. That is what I think I’d do. However, since you already have an installment plan on the lien, you should probably pay off the credit cards if they are at a higher interest rate. Once the cards are paid off, do not charge more than you can pay off each month.

You don’t say if the CC Debt is current(but just excessive) or actually delinquent and in collections.

If the CC Debt is current pay off the lien. As the lien is harming your credit more than the Credit cards are. Also, even though you are on a payment plan the IRS could take further action and has more “tools” to get you to pay than the Credit Cards do.

If the Credit Cards are in collections and they could successfully sue you, that is you are still in the Statute of Limitations. It MAY be to your advantage to take care of these to avoid additional judgments from showing up on your report.