Royal mail invoice for tax return (UK)

[JoayoCrafts]

Hi, it is the first time to do the tax return for me. 

So there are lots of I don't know. 

1) Is the card statement possible to be proof of the Royal Mail?

I found out there are only 1-year invoices on the Click and Drop website.   

Otherwise, 

2) Is there any chance to get invoices? 

Thank you in advance!

[CraftyCornishMaids]

Royal mail click and drop only goes back about 15 months

you can use your card statement, if hmrc audits you

[JoayoCrafts]

Thank you so much!