Fill a PDF file via Telegram Bot inputs

Hi community,

Not a fully newbie here but just already using some scenario templates. And now I want to go deeper with make and get some stuffs to make it easy.

My problematic :
everytime my son needs to go out fo school I need to fill a pdf with some inputs (date, time out, time in, justification, localisation) sign it manually and send it back to the school.
I’ve got the original pdf with my signature.

My goal :
via a Telegram bot, send him the specific data and send me back the final pdf.

I’ve got already a Telegram bot.
Right now I’m trying to parse the specific data but what tool to use for filling my original pdf ?

Any guidance or help will be helpful.

Thanks.

Jelto