What form should be utilized for a written solicitation for commercial services estimated at $5 million?

The correct form for a written solicitation for commercial services estimated at $5 million is the SF 1449. This form, officially known as the "Solicitation/Contract/Order for Commercial Items," is specifically designed for the acquisition of commercial services, goods, or a combination of both when the total estimated value is at or above the simplified acquisition threshold.

Utilizing SF 1449 allows for the streamlined procurement process that is often needed in commercial acquisitions. It clearly outlines the requirements and provides necessary terms and conditions, which helps both the government and the contractor understand their obligations.

In contrast, while other options serve distinct purposes, they do not fit the requirements for this scenario as effectively. Standard Form 33 is more commonly used for formal solicitations and may not be quite suitable for commercial items over $5 million. A Request for Quotation (RFQ) is typically used for lower-dollar acquisitions, and an Invitation for Bid (IFB) is generally more appropriate for fixed-price construction or procurement of goods and services, rather than for commercial services. Thus, SF 1449 is the form that aligns best with the requirements for soliciting commercial services in this context.