I've filled Amendment 5 months

was it mailed in because it can not be e-filed?    TT receives no info about amended returns.    if you did mail it, it could have gotten lost.   you can go to IRS website and and use either view your account which should show the status (if received)  or get your tax record.      if still unsure you only other option is to call the IRS     800-829-1040

First choose your language.
Then 2
Then 1
Then 3
Then 2
You should then be transferred to an agent, but there is likely to be a wait.

before calling have

Social Security numbers (SSN) and birth dates
Individual Taxpayer Identification Number (ITIN) for taxpayers without a Social Security number
Filing status – single, head of household, married filing joint, or married filing separate
Prior-year tax return
Tax return you’re calling about