2nd job tax total beginner at this

JoJoBramble102

I have to send an invoice, and then complete a tax return to pay what I owe on the extra money, I have emailed for clarification.

Thanks for all the replies I think I understand it a bit better now, I made the initial post because my manager asked me to join them had to go to a meeting and this was Friday afternoon so there was no one to ask at that point.

Bookworm105

JoJoBramble102 said:

I have to send an invoice, and then complete a tax return to pay what I owe on the extra money, I have emailed for clarification.

Thanks for all the replies I think I understand it a bit better now, I made the initial post because my manager asked me to join them had to go to a meeting and this was Friday afternoon so there was no one to ask at that point.

then it would appear you have the status of self employed sole trader (contractor) and will need to register the self assessment. 
As mentioned, when doing SA you will need to declare all income, not just what you invoice, so your PAYE job, your SE invoices and any savings income you have.

Also, please make sure you research what costs you can and cannot claim when working out your profit for tax purposes since you will be attending a location that you are also normally employed to work at.

Smacks to me of the classic case of someone working through an agency when in fact they should be an employee of the agency, not a self employed contractor to the agency. So check your contract very carefully