A pro forma invoice is the same as a commercial invoice which, when used in international trade, represents the details of an international sale to customs authorities.
TRID requires process changes to the loan origination life-cycle, particularly in the way that lenders approach the closing of loans. Under the new rule, the closing process needs to be at least three days ahead to meet the Closing Disclosure timing requirement.
My experience has been 48 to 72 hrs. However, all the lenders I use close on the closing date of the contract so there is no surprise. Some of the lenders I use actually have the loan package to the title company several days in advance of the closing. The figures for the closing are provided early enough in the process that the HUD1 (closing statement) is usually ready 1 to 3 business days in advance of the closing.