Welcome back to CODA.
There are several ways in which you can do this, depending on the format that you want to do it. In SAP s/4 HANA, all financial records are recorded in a single table, with date as one of the columns in the table. All reporting is to a large extent pivot table extracts and summaries based on that information.
Depending on the number of characteristics you want to report on, Google sheets and pivot tables is probably the best option.
However if you just have accounts (articles?) and transactions with dates, it can be easily done in CODA, with a single table.
Have a column for account, date, and amount.
Create views that group the data for you - per month, all accounts, subtotalled amounts, or the other way around, per account, per month.
If you need qty amounts, create a new column per qtr, and write a formula for each. You could also do a YTD or a annual total in the same.
For the next step, you can add a column that selects “Plan” or “Actual”, and then you can also enter a budget.
I would NOT create a column for each month, that is going to make your table very inflexible.
I’ll see if I can find some time to create an example for you. Might take a day or so.