For anyone suffering from the similar, here is how I resolved:
The root cause was the size of pdf. I was trying to attach one 21MB pdf. Splitting it into two 11MB pdfs didn't work either.
I went online, used adobe pdf compressor, and reduced the size to 2.8MB. Transmission succeeded.
The error message from turbotax - 'cancelled' or 'unexpected transmission problems' - is surely cryptic. I've wasted a few hours due to sub-par quality of the product.
Please review the following FAQ: Issues Transmitting Returns.
For anyone suffering from the similar, here is how I resolved:
The root cause was the size of pdf. I was trying to attach one 21MB pdf. Splitting it into two 11MB pdfs didn't work either.
I went online, used adobe pdf compressor, and reduced the size to 2.8MB. Transmission succeeded.
The error message from turbotax - 'cancelled' or 'unexpected transmission problems' - is surely cryptic. I've wasted a few hours due to sub-par quality of the product.