I assume by "upload" you are referring to the process of downloading information directly into your income tax return.
This process is not a transfer of an actual image of your W-2. The process transfers information off your W-2 and onto TurboTax worksheets, which information then flows to line 7 of your Form W-2. If the lender won't accept that, then you might want to get a "wage and income transcript " directly from the IRS: https://www.irs.gov/individuals/tax-return-transcript-types-and-ways-to-order-them
My advice is always download and print a paper copy of your "as filed" income tax return, to which you attach all your supporting information - 1099's, employee's copy of W-2's , etc. That way if you need any of this information, for any reason, you simply reach into your file and you have it.
Tom Young
