A lot of messing around until something actually finally sorta worked!

lib/main.dart

@@ -1,3 +1,6 @@
+// Helpful guides:
+// - https://flutter.dev/docs/cookbook/forms/validation
+
 import 'package:flutter/material.dart';
 
 void main() {
@@ -9,11 +12,75 @@ class MainApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    const recurranceValues = <DropdownMenuEntry>[
+      DropdownMenuEntry(value: "D", label: "Daily"),
+      DropdownMenuEntry(value: "W", label: "Weekly"),
+      DropdownMenuEntry(value: "B", label: "Biweekly"),
+      DropdownMenuEntry(value: "M", label: "Monthly"),
+      DropdownMenuEntry(value: "Y", label: "Yearly")
+    ];
+
     return const MaterialApp(
       home: Scaffold(
-        body: Center(
-          child: Text('Hello World!'),
-        ),
+        body: Column(mainAxisSize: MainAxisSize.min, children: [
+          Text('Input an expense below!'),
+          Row(
+            mainAxisSize: MainAxisSize.min,
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Text("Name: "),
+              SizedBox(
+                  width: 400,
+                  height: 50,
+                  child: TextField(
+                    keyboardType: TextInputType.text,
+                  )),
+            ],
+          ),
+          Row(
+            mainAxisSize: MainAxisSize.min,
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Text("Cost: "),
+              SizedBox(
+                width: 400,
+                height: 50,
+                child: TextField(
+                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                ),
+              ),
+            ],
+          ),
+          Row(
+            mainAxisSize: MainAxisSize.min,
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Text("Recurrance: "),
+              SizedBox(
+                  width: 100,
+                  height: 50,
+                  child: DropdownMenu(dropdownMenuEntries: recurranceValues)),
+            ],
+          ),
+          Row(
+            mainAxisSize: MainAxisSize.min,
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Text("Description: "),
+              SizedBox(
+                  width: 400,
+                  height: 50,
+                  child: TextField(
+                    keyboardType: TextInputType.text,
+                  )),
+            ],
+          ),
+
+
+          SizedBox()
+
+
+        ]),
       ),
     );
   }