I was told if you are on salary and you work mor than four hours a day, that if you leave early that day that they should not deduct it from your pto hours or your check. Is that true?

Every company is different on how they handle it. Am I right to assume that you don't have a company manual or a human resources dept in your place of business? If so, you might want to speak with your boss to find out why this happened. Ask what the rules are so that you know what to expect in the future. If you are a new employee and you took half a day, he/she might have been annoyed and letting you know that these are the consequences. If you are a long standing employee with a good attendance record, if you ask nicely, let them explain themselves to you. If you find the answer is not acceptable, you should point out that you are a good employee, you don't take time off unnecessarily, and that since you are salaried, you were under the impression that when you put in overtime you don't get paid for it. Ask them if that is how it works? If they say yes, then state that you don't understand how it works one way and not the other. See what they respond. If they are simply jerking you around, close your mouth and start looking around for another job.

Hope this helped.

I was told if you are on salary and you work mor than four hours a day, that if you leave early that day that they should not deduct it from your pto hours or your check. Is that true?
Yes it is correct that salaried employees are paid a set salary for a week and docking pay for a partial day is not allowed. However, if an employee does this consistently and is not working at least 40 hours or the agreed upon amount it becomes a discipline issue. You could eventually be let go if you are not working enough hours, and leaving early etc...

If you are on salary, your employer expects at least 8 hrs a day. You have to find out what your employer considers the work week - not all employers use the 40 hrs a week - especially if salaried. My last employer used 40-60 hrs a week as normal. No overtime, but then I was salaried, so that was a moot point.

If you work only four hrs a day and then leave and claim PTO, you fill find yourself unemployed soon. It will catch up to you. For that salary, the company expects some results.

You should have gotten the HR handbook - any company worth it's salt has one. If you do not see the subject about salaried employees and PTO, then ask. Document what you are told.