I signed the form 8332 many years ago when iwasnt working i am the custodial parent and i have worked for 2019 and want to claim my child what do i do

There are two ways to sign a 8332 form.

 

1) Sign part I for the current year only.   That 8332 is only good for the one year.

2) Sign part II that releases for future years as specified.

 

If you signed part I then there is nothing you need to do.

If you signed part II then you need to file a new 8332 part III that reascends part II, but  that that will not take effect for the current year.

 

See the 8332 instructions:

https://www.irs.gov/pub/irs-pdf/f8332.pdf