I am self-employed, but don't a lot of income on my tax returns, can I get a mortgage?
Yes, you can depending upon how much you have for down payment.
self-employment income
Can a borrower go from being self-employed to W2 job and qualify for a mortgage?
Yes, a borrower can switch from self-employed to W2 job and get qualified for a mortgage. How long the borrower will need to be at the new W2 job will depend upon the type of W2 income they get (salaried vs hourly vs commission).