Once you’ve selected the tax forms you want to produce, to print from Firefox click “File”, “Print” or type Ctrl + P or Command + P in macOS.
From the Firefox print preview menu, choose “More Settings”.
Look for the Scale section. Click the “Scale” radio button and set the scale percentage to 100%.
Tweaking your print alignment
If you find your alignment is slightly off, you can make small adjustments in alignment through Tax Forms Helper’s print menu.
If you glance just above the “Print onto Pre-Printed IRS Form”, you’ll see the powerhouse feature that lets you modify your data alignment.
You can move your data right, left, up or down using the adjustment indicators on the Print Menu.
Return to the Tax Forms Helper print menu to make alignment tweaks.
Simply enter a number in the hundredths box and select right/left or up/down from the dropdown options to adjust.
You can return to adjust the alignment as needed after each test run until you’re satisfied with your results.
One more alternative: printing from Adobe Acrobat Reader
If you’re still having trouble with alignment, you can also try printing from a pdf in Acrobat Reader. Some users have great success with this technique after all else has failed.