Tax Year Prior to 2020: My physical address is different from my mailing address,But the site only asks for my mailing address. Do i need to and how would i put my physical address

[benzilenci]

Hi. How did CA tax authority know that you had the address in CA? From IRS?

[benzilenci]

How did MD know you put your MD mailing address on your tax return?

[Critter-3]

Usually a state will see the tax reporting form that is sent to an address in their state so they go looking for the returns ... so if you use the MD "mailing" address to get your W-2 (or any other income reporting form) but do not file an MD return they may or may not question it.  Of course you must prove your residency if they ask which can be messy.