There are places where you can rent a box, for example your neighborhood UPS branch. You can use that address as your return address. Your return address would show up as:
Your Name
Street name and number (UPS branch address), # (your box number)
city, state and zip code
The box number appears to be an apartment number or a suite number (do not use the word "box" on your labels). Nobody will know if that is your home address or office address, or anything else.
You can check your box as often as you like. I do not know the particulars, but I think you can pay by the month, by the year, etc.
I know several shops that do this to preserve their privacy.