I was having the same problem. I am a small business therefore I can look closer into the details. I keep receipts of all my transactions on my credit cards. The main account (Core Account) was not showing the transactions for the other "umbrella" accounts. The core account was only showing the "total" balance. Like everyone else, I tried linking the umbrellas to the core (parent)account. Not possible. What I did do was go to my uploaded receipts (fairly easy because I obtain most of my receipts via email or I use the QB App and take pics of my paper receipts during my spare time.) As I categorized my uploaded receipts from the "umbrella" accounts, I specified the "Bank/Credit account" as the designated "core/main" account. I completed the rest of the information as far as, type of expense, customer, category...etc. After this, since QB cannot match it to anything, I clicked "Create Expense"... and once I did this, all of the transactions appeared in my "Core account" perfectly matching to the balance with Bank of America. This is useful to me since I link all my receipts to their designated transactions anyway and this saves me time from manually having to input the expenses in the core account as journal entries. I don't know if this will backfire in any way, but it was the best solution that I personally was able to find. I hope this helps someone.