I paid my 1099 subcontractor with one check. Within the check there where expense reimbursement. How do i go back and categorize expenses from salary?

Let me help you categorize your expense from salary in your 1099s, @EPS2019.

For us to mapped your 1099 with the correct expense account, you can open your check transaction and change the category account from expense salary. You can simply click the CATEGORY drop-down arrow and select the expense, then click Save.

Once done, you can go back to your 1099s and map your Box:7 with the correct account. Just click the Nonemployee Compensation drop-down arrow and check the expense account.

We also have a feature that will allow your contractor to view their 1099s online. You can add them as a contractor in QuickBooks Online. As soon as you submit their final forms to the IRS, we’ll invite them to view their 1099s online. 

You can always tag me in the comment section if you have further questions when processing your Year-end reports.