USA consultant with a Canadian Client

I am a self employed consultant,   My largest client is a Canadian company.   I invoice them every 2 weeks and they pay me with a wire transfer.   I do not get a 1099 or any type of tax form from them. 

I have been paying estimated quarterly taxes on my own. 

to file for 2022 is all I need to to is simply add up what they paid me and count it as gross income?    I have nothing "official" from them, just my invoices and my bank statements showing the deposits.