What information do i need to put on an invoice?

Question

self employed locum

Answer 1

Seller's name, address & phone

Buyer's name, address & phone

Transaction date

Item number (if applicable)

Item description

Number of each item ordered

Item price

Extended price

Sub total

Sales tax

Shipping/handling (if applicable)

Discount (if applicable)

Total amount due

Method of payment

Deposit (if applicable)

Balance due (if applicable)

"Thank You"

I think that's everything.  Hope this helps.