Is having a double job legal?

Hi guys. Please share your inputs.

So for context, I am currently in a bad financial position right now so binabalak ko ng mag two jobs. Ayoko kasing bitawan yung first job ko. It is a day job the usual 9-6pm tapos feeling ko kaya ko naman ng isa pa. Manageable naman workload ko dito sa day job ko.

Now I’m curious if pwede ba ako mag dalawang full time job? Kasi naliliitan ako sa salary if part time lang. Pero legal ba yun? Pwede ko ba irequest sa second job ko na wag na nila ako kaltasan ng gov remittances para if ever hindi matrace? Meron bang naka experience na nang ganun?

I know finding freelance jobs is an option pero wala kasi akong experience doing that or being a VA kaya natatakot ako baka wala tumanggap sakin.

Idk. I just badly needed a second source of income. Tips naman dyan. Thank you!