So on my most recent call, I was finally pointed to the fact that I had both crypto and stock trades. These trades numbered in the thousands. As such, instead of filing the trades individually, I instead put in a summary of the total short term gains and short term losses, to establish a capital gains balance. I removed all the individual transactions and then submitted. Upon the first attempt at submission there was the same old error again, but shortly thereafter, the screen changed to show that the taxes had been filed.
The crux of why it was unable to print preview or submit, is the sheer number of transactions. The software, both desktop and online are unable to handle over 2000 transactions. By submitting a summary of the transactions instead and keeping my transactions readily available to send on request, I was able to finish submitting online. Hope that helps.
