@Maz *******
I donāt think sharing tax returns is vital, but if needed to support an application, I would not be concerned with their security on their system.
I just kinda threw everything at them. (Not tax returns) but all kinds of income streams. Pension, rental income. investment income etc. Iām really not sure what was accepted and what was rejected. They just send you an āapprovedā notice. And then make an appt.
If you had concerns about the tax return, I do believe they would offer you an appt to bring the papers if you prefer. They seemed to have a lot of people in the offices for explanation and discussions