Unable to complete sales form - will not accept my entries

Unable to complete sales form - will not accept my entries

CRM will not accept dates on the calendar for a new sales order- it kicks me out therefore I cannot complete or save a sales order entry.  I tried entering the date manually and it will not accept that either.   Also - when I click in the arrow button at the lower right of the sales order form - I am not allowed access to enter a discount or sales tax.  What is going on? HELP!!!