Notices of Assessment for State Withholding Taxes

I have one employee in one state and since the transition to Check, my state withholding taxes have been paid, but are not being attributed to my account correctly. For period ending 6/30, and 7/31, I have received notices of assessment from that state indicating I didn't pay.

The first time I connected with Wave support, and they filed a ticket on my behalf for proof of electronic payment because this feature isn't available on the user end. I can't verify the payments with any documentation to show the state because Wave doesn't make that available. I received a PDF of electronic payment for period ending 7/31, but not 6/30.

When I asked again, I was told, "This is the only document Check is offering at this time, I'm afraid."

Has anyone else had this problem where payments are made but aren't matched to your account? Did you manage to solve it?