Investors & landlords

We do file jointly at tax time, but is it allowed that he puts the 500.00 on his W-4 form? We understand we may owe more at the end of the year, but we need more throughout the year on paychecks. I guess what I am asking is are we doing something wrong by putting that 500.00?  W-4's are confusing and we have been doing in that way for several years now.