@dfitch01   I'd be interested to see your reference material on that.  The MD DLLR has specific instructions for 3rd party agents on setting up the efile of the DLLR 15 (quarterly wage report), and I have successfully filed the form through QuickBooks desktop since the change.  I couldn't find any reference to them discontinuing 3rd party payments. 

Their Instructions for Third Party Agents publication details how to set up the new format for e-filing the forms, but the only reference I found to payments simply says this:  

Q: Will modernization require reimbursing billing payments to be made electronically?
A: The preference would be to receive payment electronically. However, payments can also be made by check and a P.O. Box has been established for reimbursable payments.

I've got an email out to the MD DLLR asking that very question, but they haven't responded yet. 

And regardless of whether we have to do this extra step (of logging onto the Beacon site to pay), I (and all my Maryland clients) need QuickBooks to NOT abort every time we try to look at the epayment history within any company file.