Should I send an amended tax payment when my return is still pending? Will the IRS take my amended tax balance out of my pending return?

In verifying requested information on my 2020 return, I found an error and needed to amend. The amendment shows I owe money. Do I include a check for the payment? Will I still get my original return? Or should I not send payment under the assumption that the IRS will take the payment out of my original refund?