Related article:
Proceeds and acquisition costs are very high

The following reports will be aggregated if you have a large number of disposals:
- Complete Tax report
- IRS report
- Turbotax report

You will see this note in your Complete Tax report if the transactions have been aggregated:

You can generate the Capital Gains report to see the full list of disposals.

These reports will contain the same information but in different formats. The reason for this is because Turbotax only allows a maximum of 2250 disposals so Koinly will aggregate your transactions if you have more than that. The aggregation is done according to Turbotax guidelines and is accepted by the IRS.
Update January 2023:
Turbotax have increased the maximum number of disposals to 4000 so Koinly will now only aggregate Turbotax reports that contain more than 4000 lines.

All disposals will be aggregated into two entries for each currency. One of these entries is the sum of all disposals that resulted in a loss and the other entry is the sum of all transactions that resulted in a profit.
The 'Date Sold' column will show the date of the first disposal that was included in the aggregated line. The 'Date Acquired' column will display the date of the acquisition used for this first disposal.

Example:
Let's say that Koinly was aggregating these 5 BTC disposals:
01/01: 1 BTC sold for a profit of $4000
02/01: 2 BTC sold for a profit of $5000
03/01: 1 BTC sold for a loss of $1000
04/01: 1.5 BTC sold for a loss of $1500

05/01: 1 BTC sold for a profit of $500

These disposals would be aggregated into 2 entries, one for the total loss and one for the total profit:
01/01: a total 4 BTC sold for a profit of $9500

03/01: a total 2.5 BTC sold for a loss of $2500