One is in the printing program you're using. Make sure your margins and page size are correct. Check all of the options in the program you're using to print twice, three times. If the same program consistently loses 10-15% of the right hand side, you've found your problem. If you are facing the HP Printer not printing left side of page issue then follow these solutions.
How to print a Word document without margins?
In the document you will print without margins, click Layout > Page Setup in the Page Setup group.
In the Page Setup window, change the Top, Bottom, Left and right to 0 under Margins tab, and then click the OK button.