Using Quickbooks on 2 computers

Will the backup file overwrite the previous saved version?  I have Quickbooks on 2 computers.  I took the orginal company file to the 2nd computer and uploaded it then started entering data.  Simultaneously the original file had some additional data entered.  If I bring the company file from the 2nd computer to the orginal computer, will I lose the recently entered data on the orginal file?

yes, you would lose the date.  You can only backup on one, restore on the 2nd, work on the 2nd, then restore to the first.   Does this make sense.  You cannot enter data on both computers and then merge them somhow...you are working with only ONE file, but transporting back and forth between computers. As the initial answer said, you cannot use the file on both computers simultaneously.   To prevent loss of data and much confusion, you can either use a remote access program instead as suggested, or switch to Quickbooks Online addtional - not necessarily recommended, do your research first on this especially converting BACK to a desktop version.   Or, load your Quickbooks on a laptop and take it everywhere you want!  ( PS  backup, backup , backup....and did I say always have an alternating, transportable backup??)

If you have two current data files, you can purchase an add-on from the Marketplace (see Karl Irvin's data transfer utility).  This will allow you to "merge" the two data files without losing any data.