I didn't file for 2018 & 19.I didn't work & didn't have salary. I want to get economic impact payment for Covid19. I registered for 0 refund but it asks to mail(Not pos).

[shohrehjannesari]

In addition, IRS does not have my address.

[DeanM15]

You can use this link at the IRS to get them information. 

If you:

• Have a valid Social Security number,
• Could not be claimed as a dependent of another taxpayer, and
• Had adjusted gross income under certain limits.

and 

• Had gross income that did not exceed $12,200 ($24,400 for married couples) for 2019
• Were not otherwise required to file a federal income tax return for 2019, and didn't plan to

See here.