I just amended 2020 tax and 1040-X said I had a refund. But after E-file, TurboTax printed a 1040-V Payment Voucher. Should I mail in the voucher while I have refund due?

I am confused. 1040-X said I have a refund due to me, but after efile, TurboTax said "You've e-filed, but do not forget to mail in these forms" and printed out a 1040V payment voucher which indicated I should mail a payment to IRS. I am confused whether I should wait for the IRS to mail me the refund check, or should mail IRS a check for the amount stated on the 1040V payment voucher.