My company has merged with two other companies since April 2015. we took over their accounts in July and all recorded in one company's account . but the accounts for the other two companies between Apr to Jul are still not recorded on Sage( our current financial year is from Apr 2015 to Mar 2016.) All the purchases and sales invoices and paperwork have been kept in a big case.
Now we are in Jan 2016 .
How can I record the post merger activities for the other two companies between April and Jul 2015?